I don't want to spend a lot of time talking about technique (or my lack thereof), but rather just give a show and tell version of what each piece of lighting contributes to the overall image.
One of the things I like to do is to look at an image and try to dissect the light by looking at the highlights, shadows etc. If you are the same, the skip down to the bottom of the post to see the final result.
The image is the result of three strobes and one large reflector for fill (a very simple and common setup).
The light setup:
Images showing the progression of adding the different light sources. First off an image showing the result of the main Octabox (47") lighting the subject only: